1. Within the Queue the ability to "slide" techs around. Currently if I have 7 things queued and I want to swap #2 and #5 I have to cancel everything from #2 down and then re-double click in the proper order.

2. From the tech trees it might be beneficial to be able to add something to start right away. Say you've maxed out your ships and want to get another level of advanced shipyards going immediately. It would save having to delete your entire queue just to move it up top.